Nakanishi Metal Works Co., Ltd.

Jtekt Corporation

Yasuhiro Narazaki

Kohei Shibata

Yoshio Horikawa

Shogo Fukada

Masayoshi Nakamura

Hiroshi Yano

Osamu Fukuda

Ikuhisa Maeda

A strut bearing includes an upper case, a lower case, an upper raceway ring held by the upper case, a lower raceway ring held by the lower case, and rolling elements that roll in a space between the upper raceway ring and the lower raceway ring. The upper case has an upper surface on which an annular recess is provided, and the annular recess contains an elastic member fitted thereinto. The elastic member includes a base in the recess and a protrusion protruding from the upper surface of the upper case.

Strut bearing and vehicle strut suspension

In a strut bearing device, an upper spring seat made of steel has a cylindrical part and a disc part. The cylindrical part has, at an upper part thereof, an engagement hole penetrated in a radial direction. A lower case of a strut bearing has a cylindrical member fitted along an inner peripheral surface of the upper part of the cylindrical part. The cylindrical member has, at its outer peripheral surface, an engagement projection that is engaged with an engagement hole. Relative movement of the upper spring seat and the lower case in an axial direction and in a circumferential direction is restricted in a state where the engagement projection is engaged with the engagement hole.

Strut bearing device, and vehicle strut suspension

Annular joint surfaces of a lower case of a strut bearing device respectively have case-side projections that project in an axial direction. Shapes A of the case-side projections, seen in an axial direction, continue in a circumferential direction, and vary their position in a radial direction along the circumferential direction. An inner-diameter side seal has a seal-side recess fitted to the case-side projection. An outer-diameter side seal has a seal-side recess fitted to the case-side projection.

Strut bearing device, vehicle strut suspension, producing method of lower case and seal of strut bearing device, and producing method of upper case and seal of strut bearing device

An upper case manufacturing method using an axial draw mold, in molding of an upper case made of a synthetic resin and including an inclined cylindrical portion. A fixed mold is provided with a first half body, and a movable mold is provided with a second half body. The first half body and the second half body abut against each other in an inclined plane. The first half body has a first flat surface at both ends on the inner diameter side of the inclined cylindrical portion in the inclined plane, and the second half body has a second flat surface at both ends on the inner diameter side of the inclined cylindrical portion in the inclined plane. The first flat surface and the second flat surface are flat surfaces that prevent the occurrence of undercutting when the upper case is removed from an injection molding mold.

Manufacturing method for upper case of strut bearing, and strut bearing

An upper raceway ring has an inward flange portion. A lower raceway ring has an outward flange portion. An upper case has an outwardly projecting piece projecting in the radially outward direction toward an end surface of the inward flange portion from a surface facing the end surface. A lower case has an inwardly projecting piece projecting in the radially inward direction toward an end surface of the outward flange portion from a surface facing the end surface. The end surface of the upper raceway ring comes into contact with the outwardly projecting piece of the upper case, to allow the upper raceway ring to be held by the upper case. The end surface of the lower raceway ring comes into contact with the inwardly projecting piece of the lower case, to allow the lower raceway ring to be held by the lower case.

Provided is a strut bearing including an upper case and a lower case that are made of a synthetic resin, and an engaging portion for preventing separation of components which are free from any stress exerted thereon during assembly. The strut bearing includes an outwardly-projecting piece row on an inner diameter side of an upper case, and an inwardly-projecting piece row on an inner diameter side of a lower case. Within a relative pivoting range of the upper and lower cases in a use state of the strut bearing, a detachment preventing engagement portion for preventing the upper and lower cases from being separated from each other in the axial direction is provided. Within a predetermined angle range outside the relative pivoting range, the detachment preventing engagement portion is not present.

A protective cover () having a reliable sensor holder part (B) that prevents reduction in air tightness and strength of a division wall (B) between a magnetic sensor (A) and a magnetic encoder (). The protective cover () is press-fitted into an outer ring to seal one axial end portion of a bearing, and has the sensor holder part (B) holding the magnetic sensor (A). In the protective cover (), a disc-shaped member () has a thick part () formed as a flow path for preferentially charging a molten resin into a thin part for forming the division wall (B) in a cavity of a molding die for use in injection molding between a position corresponding to a gate of the molding die and the division wall (B).

Protective cover having sensor holder part, bearing device including the protective cover, and method for manufacturing protective cover having sensor holder part

Growing community of inventors

Osaka, Japan

Yasuhiro Narazaki